Arch structure



May 20,19305 B. DOBIE 1,759,102

I ARCH STRUCTURE Filed Aug. 10, 1922 2 Sheets-Sheet l May 20, 1930. B. DOBIE ARCH STRUCTURE Filed Aug. 10. 1922 2 Sheets-Shes: 2

Patented May 20, 1930 UNITED STATES PATENT OFFIC BRADLEY DOIBIE, OF RIDGEWOQD, NEW JERSEY, ASSIGNOR TO AMERICAN ARCH COM- IPAN'Y, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

, ARCH STRUCTURE .1

Applieation filed August 10, 1922. Serial No.- 580,857.

This invention relates to arch structures and it is especially useful in connection with arches such as used in power furnaces.

One of the primary objects of my invention is the provision of an improved form of nose'for the arch, the bricks or tiles comprising which may be readily installed and replaced and are so supported that a brick or bricks may be taken out for replacement without disturbing the remaining bricks.

Another object has to do with the pro vision of an improved arrangement of curtain and nose brick whereby the former do not interefere with the installation and replacement of the latter, which also maybe replaced with minimum difficulty.

' A further object of the invention is the provision of an improved arrangement of and support for the "nose brick whereby the size and weight of such bricks are kept within practical'limits. I

My invention also contemplates an improved supporting means for carrying the brick.

2 The foregoing, together with such other objects and advantages as may hereinafter appear, or are incident to my invention, I obtain by means of a construction which I have illustrated in preferred form in the accompanying drawings, wherein Figure 1 is a cross-section through a stoker fired furnace illustrating/my improvements. Figure 2 is an enlarged view illustrating the nose and curtain brick and their support ing means;

Figure 3 is a section taken on the line 3-3 of Figure 2; and

Figure 4 is a still further enlarged section taken on the line 4=4 of Figure 2.

.40 Referring now to Figure 1, the reference letter A denotes the ombustion chamber of the furnace; such chamber being formed by the rear or bridge wall .7, the side walls 8, the curtain Wall 9, the main arch 10, and the ignition arch 11. The chain grate stoker is diagrammatically indicated at 12, the coal being introducedthr'ough the door or opening 13. The nose (1 of the main arch will now be described, attention being directed to the remaining figures.

The nose is preferably composed of three.

courses of wedge shaped bricks 14, set on edge and arranged in pairs, the configuration of the bricks being such that when a pair are assembled, a head 15 is provided. I This head is adapted to be engaged by' pairs of clips 16 which in turn are secured to the Web 17 of the supporting members or hangers B to be later described. The nose brick are cemented and grouted together, butthe pairs are independently supported and one or more pair can be removed without disturbing the remaining bricks by cracking the joint. Each supporting'member carries, in effect, a tier of nose brick, such bricks constituting the considered. I

The supporting members B consist of a castinghaving the web 17-before mentioned and the flange or base portion 18, which. is

ing members are provided with T-shaped' courses of the nose of the arch, transverselyportions 25 over which appropriately re- 5 cessed curtain bricks 26 are hung. Each T- head supports a pair of bricks.

The supporting members thus carry" the bricks of the end course of the main arch, the nose bricks, and the bricks 2B of the curtain wall 9, but each independently of the other, the load bein web 17 has a ange or seat'portion 27 against whichlahe lowermost course of the nose brick bear and thus the nose of the arch, considered as a whole, is independent of the main arch.

The main portion of the curtain wall is sup ported from the I beams 19 as shown in Figure 2, and the space between the nose and the main portion of the curtain wall is closed by the curtain brick 26 and the bricks 28, the latter being carried on the former. To resubstantially' balanced. The

move the curtain brick or bricks 26, one or more of the bricks 28 are removed which will permit of raising the bricks 26' sufiiciently to clear the hooked portions thereof from the T-heads.

It will be noted that the nose has a fantail shape permitting free flow of the flame and gases from under the arch and reducing the scouring action which is quite marked when sharp corners are presented.

The supporting members B are protected from the heat and are readily accessible from the front of the combustion chamber, as are the han ers for the main arch.

The foregoing and other advantages incident to my improvements will be understood by those skilled in the art.

I claim 1. In a furnace arch construction the combination of a supporting member and a fantail set of nose bricks supported therefrom, the bricks of the set being arranged in alignment and pivotally secured to said supportlng member independently of adjacent bricks circumferentially of the nose.

2. In furnace structures the combination of a main arch, a curtain wall and fantail sets of nose bricks between the main arch and the curtain wall, together with means for pivotally supporting each individual brick of said fantail set in alignment with the other bricks of the set.

3. In furnace structures the combination of a main arch, acurtain wall and fantail sets of nose bricks between the main arch and the curtain wall, the bricks of each set being disposed in alignment circumferentially of the nose, together with means for pivotally supportin each individual brick of said sets indepen ently of adjacent circumferentially disposed bricks of said nose.

nvsaioa tially of the nose and from the exterior of the combustion chamber.

8. In furnace structures, an arch nose comprising a plurality of substantially vertically disposed supporting members, and nose bricks supported thereby for removal independently of adjacent circumferentially disposed bricks, each member having a tier of such bricks and the bricks of the tiers constituting the courses of the nose.

9. In furnace structures, an arch nose comprising a plurality of substantially vertically disposed supporting members, and nose bricks detachably carried thereby, each member having a tier of such bricks and the bricks of each tier being detachable independently of each other from the exterior of the coinbustion chamber. i

10. In furnace structures, an arch, an arch nose composed of a plurality of nose bricks arranged arcuately in a plane substantially at right angles to the arch, a common supporting member therefor, and means securing the bricks thereto for removal independently of adjacent circuinferentially disposed bricks.

11. In furnace structures, the combination ofarch bricks, sets of fantail nose bricks and curtain bricks, said arch, nose and curtain bricks being supported for removal independently of each other but cooperating in forming a combustion chamber.

12. In furnace structures, the combination of arch bricks, sets of fantail nose bricks and curtain bricks, all of said bricks including the bricks of the fantail sets being supported for independent removal. I

In testimony whereof I have hereunto signed my names BRADLEY DOBIE.

4. In furnace structures the combination a of a main arch, fantail sets of nose bricks adjacent an end of said main arch and disposed in alignment circumferentially of the nose, supporting members for said fantail sets and means for pivotally supporting the fantail bricks of each set from said member independently of adjacent circumferentially disposed bricks of the nose.

5. In furnace structures, a main arch, and

I an arch nose composed of a plurality of arcuately arranged bricks, all of said bricks being supported for removal independently of adjacent brickscircumferentially of the are.

6. In furnace structures, ,a main arch, and an arch nose composed of a plurality of bricks arranged fan-tail-wise, and supported for removal independently of adjacent bricks cir-j cumferentially of the nose.

7. In furnace structures, an arch nose composed of a plurality of bricks arranged fantail-wise and supported for detachment independently of adjacent bricks circumferen- 

